Window fly-screen.



J. L. EDLUND.

WINDOW FLY SCREEN.

APPucATmN FILED FEB. ls. 1913.

Patented July 11, 1916.

JOHN LUDVIK EDLUND, OF GLARESHOLIVI, ALBERTA, CANADA.

WINDOW FLY-SCREEN.

Application filed February 15, 1913.

To all whom t may concern:

Be it known that I, JOHN LUDvIK ED- LUND, of the town of Claresholm, in the Province of Alberta, Dominion of Canada, have invented certain new and useful Improvements in Window Fly-Screens, of which the following is a specification.

This invention relates to improvements in window fly screens and the objects of the invention are to provide a simple and effective form of screen which will be invisible and protected from dirt and wear when not in use, and one which will enable the window to be raised and lowered without the trouble of removing the screen by hand when not in use, and further to provide simple and effective means for connecting and disconnecting the screens, and it consists essentially of the improved construction hereinafter described in detail in the accompanying specification and drawings.

In the drawings: Figure 1 is an elevation of a window embodying the present invent tion, the sash being closed. Fig. 2 is the same view with the sash raised. Fig. 3 is a vertical section through the window frame. Fig. 1 is an enlarged sectional detail through the recess inclosing the latch bolt. Fig. 5 is a perspective detail of the end of the sash. Fig. 6 is a detail of the lower end of the screen.

In the drawings like characters of reference. indicate corresponding parts in all the figures.

Referring to the drawings, A4 represents a window frame, B a window sill and C a window sash of any suitable or usual construction.

In accordance with the invention, the bottom of the window sash is formed with a longitudinal recess 10 adapted to contain the screen roller D. This screen roller is similar in construction to an ordinary Hartshorn window shade roller with the locking dogs at the end removed and the pintles 11 of the roller are adapted to be supported by plates 12 which cover the ends of the recess 10, the spring within the roller maintaining the screen normally in rolled position.

The screen 13 wound on the roller is made of any suitable material, such as cheese cloth or mosquito netting, or if desired wire fabric. A bar 14 forms the bottom of the screen and is provided substantially at the center with a perforation 15. When the Specification of Letters Patent.

ratenteu Jury ii, raie.

Serial No. 748,753.

screen is rolled up the perforation 15 is adapted to register with a slot 16 in the bottom of the sash.

The bar 111- of the screen is adapted to be connected to the window sill by releasable means, the means which I have illustrated comprising a spring actuated latch bolt 17 which extends through a transverse perforation or bore 1S in the window sill, such spring being designed to normally press the latch bolt inwardly into the window sill. This latch bolt is surrounded by a spring 19 which bears against a pin 20 in the bolt at one end and against a plate 21 at the opposite end which forms the end of the perforation.

The outer end of the bolt is formed with a thumb piece 22 for convenience in turning, while the inner end is pointed and provided with a notch 28 adapted to fit the perforation 15 in the bar 14. The latch bolt is adapted to nass through vthe slot 16 into the perforation 15 and by a turning movement the notch 23 engages with the bar 14e thereby locking the said bar in the said perforation.

To produce a tight ft between the screen and bottom sides of the window frame so that flies, or other insects cannot enter the interior of the building, the sides of the frame are provided with longitudinal grooves 24 which run from the bottom upwardly and from the top downwardly to about the center,the upper groove being used for a screen on the upper sash. Each groove 24 is provided with a transverse entrance groove 25 which extends at substantially right angles thereto. These grooves will accommodate the pintles 11 of the spring roller.

It will be appreciated that the pintle on one end will be square and on the other end round. after the usual manner of constructing Hartshorn shade rollers, the pintle on one end rotating and serving to wind the taut however by the spring within the roller D. ATo enable the screen to fit more tightly to the sides of the window frame, thel1 edges thereof may be puckered or rufe The device can be used with a window of any size and it will be seen that it effectively covers the entire window opening, and while window frame having longitudinal grooves inthe sides extending upwardlv from. the bottom and downwardly from the top to near thecenter thereof, of sashes, spring roller screens carried by the sashes having plntles and the vertical edges of the screens engaging the said grooves, transversely extending entrance grooves communicating with the longitudinal grooves and spring controlled looking means operatively mounted in the frame and designed to coact with the free end of the screens.

2. In a window the combination with a window frame of a sash, spring controlled screens carried by the sash, a bar forming the end of the screen having a perforation therethrough, a sill having a transverse perforation, a latch bolt located in the transverse perforation having the outer end provided with a thumb piece and the inner end with a notch adapted to engage the perforation in the bar and a spring adapted to normally press the latch bolt inwardly into the said sill.

In witness whereof vI have hereunto set my hand in the presence of two witnesses.

JOHN LUDVIK EDLUND. Witnesses:

H. STRANG, J. S. SALMON.

Copiesv of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

